"When I saw the pictures of David and Victoria Beckham's 4-year-old daughter Harper using a dummy, I knew they were going to get stick for it," she wrote in her Ok! magazine column. "If I ever put a picture of Parker up on Instagram with him using a dummy, there's always someone who comments on the fact he has one."

And the Saturdays singer said she has complete faith in the dad-of-4's ability to parent. "David said no one has the right to criticise him as a parent and I think he's right," she wrote. "It's their fourth child, so they know what they're doing."